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Unipolar Hall Switch-Low Sensitivity 1 3.10 Nov 1, 201 3 Features and Benefits – 3.5V to 24V Operation – -40°C to 150°C Superior temperature operation – CMOS technology – Low current consumption – Chopper-stabilized amplifier stage – Open drain output – Low sensitivity – Small Size SOT23 3L or SIP 3L – both RoHS compliant packages Application Examples – Automotive, Consumer and Industrial – Solid-state switch – Brushless DC motor commutation – Speed detection – Angular position detection – Proximity detection – Current detector 3 pin SOT23 (suffix SO) 3 pin SIP (suffix UA) Functional Block Diagram VDD OUT Voltage Regulator Chopper Hall Plate GND Pin 1 – VDD Pin 1 – VDD Pin 2 – GND Pin 2 – OUT Pin 3 – OUT Pin 3 – GND

Unipolar Hall Switch-Low Sensitivity 2 3.10 Nov 1, 201 3 General Description The SS1344 is a unipolar Hall-effect sensor IC fab- ricated from CMOS technology. The device inte- grates a voltage regulator, Hall sensor with dy- namic offset cancellation system, small signal a m- plifier, Schmitt tr igger and an open-drain output driver. With suitable output pull up, they can be used with bipolar or CMOS logic circuits. These Hall-effect switches are monolithic integra t- ed circuits with tighter magnetic specifications, d e- signed to operate continuously over extended te m- peratures to +150 °C,and are more stable with both temperature and supply voltage changes. The un i- polar switching characteris tic makes these devices ideal for use with a simple bar or rod magnet. Thanks to its wide operating voltage range and e x- tended choice of temperature range, it is quite sui t- able for use in automotive, industrial and consumer applications. The device is delivered in a Small Outline Transi s- tor (SOT) or in a Plastic Single In Line ( SIP 3L flat). Both 3-lead packages are RoHS compliant. Glossary of Terms MilliTesla (mT), Gauss Units of magnetic flux density: 1mT = 10 Gauss RoHS Restriction of Hazardous Substances Operating Point (BOP) Magnetic flux density applied on the branded side of the package which turns the output driver ON (VOUT = VDSon) Release Point (BRP) Magnetic flux density applied on the branded side of the package which turns the output driver OFF (VOUT = high)

Unipolar Hall Switch-Low Sensitivity 3 3.10 Nov 1, 201 3 Pins Definition and Description Absolute Maximum Ratings Parameter Symbol V alue Units Supply Voltage VDD 28 V Supply Current IDD 50 mA Output Voltage VOUT 28 V Output Current IOUT 50 mA Storage Temperature Range TS -65 to 170 °C Operating Temperature Range Symbol Value Units Temperature Suffix “E” TA -40 to 85 °C Temperature Suffix “K” TA -40 to 125 °C Temperature Suffix “L” TA -40 to 150 °C Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum- rated conditions for ex- tended periods may affect device reliability. SOT Pin № SIP Pin № Name Type Function 1 1 VDD Supply Supply Voltage pin 2 3 OUT Output Open Drain Output pin 3 2 GND Ground Ground pin

Unipolar Hall Switch-Low Sensitivity 4 3.10 Nov 1, 201 3 General Electrical Specifications DC Operating Parameters TA = 25°C, VDD= 3.5V to 24V (unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Un its Supply Voltage VDD Operating 3.5 24 V Supply Current IDD B < BRP 1.5 2.5 5 mA Output Saturation Voltage VDSon IOUT = 20mA, B > BOP 0.4 0.5 V Output Leakage Current IOFF B < BRP VOUT = 24V 0.01 10 µA Output Rise Time tr RL = 1kΩ, CL = 20pF 0.25 µs Output Fall Time tf RL = 1kΩ, CL = 20pF 0.25 µs Magnetic Specifications DC Operating Parameters VDD = 3.5 to 24V (unless otherwise specified) Package Parameter Symbol Test Conditions Min Typ Max Units UA Operating Point BOP Ta=25°C,Vdd=12V DC 70 150 G Release Point BRP 20 100 G Hysteresis BHYST 50 G SO Operating Point BOP Ta=25°C,Vdd=12V DC -150 -70 G Release Point BRP -100 -20 G Hysteresis BHYST 50 G Output Behavior versus Magnetic Pole DC Operating Parameters TA = -40°C to 150°C, VDD = 3.5 to 24V (unless otherwise specified) Test Conditions (UA) Test Conditions (SO) OUT B < BRP B > BRP High B > BOP B < BOP Low The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be turned on(drops low) in the presence of a sufficiently strong North pole magnetic field applied to the marked face.

Unipolar Hall Switch-Low Sensitivity 5 3.10 Nov 1, 201 3

Application Information

It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor) between the supply(VDD Pin) and ground(GND Pin) of the device to reduce both external noise and noise gener- ated by the chopper stabilization technique. As is shown in the following figure, a 0.1μF capacitor is typical. For reverse voltage protection, it is recommended to connect a resistor or a diode in series with the VDD pin. When using a resistor, three points are important: - the resistor has to limit the reverse current to 50mA maximum (VCC / R1 ≤ 50mA) - the resulting device supply voltage VDD has to be higher than VDD min (VDD = VCC – R1*IDD) - the resistor has to withstand the power dissipated in reverse voltage condition (PD = VCC /R1) When using a diode, a reverse current cannot flow and the voltage drop is almost constant (≈0.7V). Therefore, a 100Ω/0.25W resistor for 5V application and a diode for higher supply voltage are recommended. Typical Three-Wire Application Circuit When a weak power supply is used or when the device is intended to be used in noisy environment, it is recommended that following figure is used. Automotive and Severe Environment Protection Circuit The low-pass filter formed by R1 and C1 and the Zener diode Z1 bypass the disturbances or voltage spikes occurring on the device supply voltage VDD. The diode D1 provides additional reverse voltage protection. Both solutions provide the required reverse voltage protection. ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. SS1344 SS1344

Unipolar Hall Switch-Low Sensitivity 6 3.10 Nov 1, 201 3

Package Information

Package UA, 3-Pin SIP: 4.0 ± 0.01 1.27 2.13 1.87 1.00 1.20 45° ± 1° 1.52 ± 0.1 3° ± 1° 0.75 ± 0.05 3.0 ± 0.01 0.44± 0.01 0.05 ± 0.05 1.6.± 0.1 0.84(Nom) 3° ± 1° 6° ± 1° 6° ± 1° 3° ± 1° 14 .5 ± 1 Active Area Depth: Sensor Location Notes: 1). Controlling dimension : mm ; 2). Leads must be free of flash and plating voids ; 3). Do not bend leads within 1 mm of lead to package interface ; 4). PINOUT: Pin 1 V DD Pin 2 GND Pin 3 Output 0.39± 0.01 0.38 ± 0.01 2.54

Unipolar Hall Switch-Low Sensitivity 7 3.10 Nov 1, 201 3 Package SO, 3-Pin SOT-23:

Ordering Information

Part No. Pb-free Temperature Code Package Code Packing SS1344ESOT YES -40°C to 85°C SOT-23 7-in. reel, 3000 pieces/reel SS1344EUA YES -40°C to 85°C TO-92 Bulk, 1000 pieces/bag SS1344KSOT YES -40°C to 125°C SOT-23 7-in. reel, 3000 pieces/reel SS1344KUA YES -40°C to 125°C TO-92 Bulk, 1000 pieces/bag SS1344LSOT YES -40°C to 150°C SOT-23 7-in. reel, 3000 pieces/reel SS1344LUA YES -40°C to 150°C TO-92 Bulk, 1000 pieces/bag 2.70 3.10 1.00 1.30 0.70 0.90 0.00 0.10 0.35 0.50 0.10 0.25 0.20 Min 2.60 3.00 1.50 1.80 1.70 2.10 2 1 Top Side Vie End Notes 1). PINOUT: Pin 1 VDD Pin 2 Output Pin 3 GND 2). All dimensions are in millimeters;